Battery madness

Hi all Im new to the forum so forgive me if this has been discussed. I got my update at a local dealer a couple of weeks back and now my car is acting all kinds of strange. First it refuses to charge over 45-50%. Then yesterday as I was parking the car I got a check engine light and a message “Propulsion Power Reduced”. The AC stopped working. And the car doesnt charge whatsoever now. I took it to a PepBoys to get a read and I got the attached code (P1E00). What in the heck is happening?! Thanks in advance for your help.